Bending brake attachment for vise jaws



Jan. 26, 1954 P. KILHAM BENDING BRAKE ATTACHMENT FOR VISE JAWS lFiledApril 28. 195o 2 Sheets-Sheet l ffarnevys.

Jan. 26, 1954 P. KILHAM 2,667,201

BENDING BRAKE ATTACHMENT FOR VISE JAWS Filed April 28. 195o 2sheets-sheet a @Mimi vPatented Jan. 26, 1954 BENDING BRAKE ATTACHMENTFOR VISE JAWS Peter Kilham, Plainville, Mass. Application April 28,1950, Serial No. 158,775

2 Claims.

My invention relates to an improvement in bending brakes. One purpose isto provide a bending brake of simple, efficient structure.

Another purpose is to provide a bending brake which may be appliedreadily to or used with a bench vise.

Another purpose is to provide such a brake which may be removablyapplied to a bench vise or the like.

Another purpose is to provide an easily demountable bending brake which.may be transported readily and which may be efficiently used on anywork bench.

Other purposes will appear from time to time in the course of thespecification and claims.

I illustrate my invention more or less dicgrammatically in theaccompanying drawings wherein:

Figure l is a plan view;

Figure 2 is a side elevation;

Figure 3 is a section at the line 3--3 on Figure 2, on an enlargedscale; and

Figure 4 is a section at the line 4*4 on Figure 1, showing the parts ina different position.

Like parts are indicated by like symbols throughout the specificationand drawings.

Referring to the drawings, I indicates any suitable supporting surface,such as the top member of a work bench or the like. 2 generallyindicates a vise base shown, for example, as secured to the bench I byany suitable screws 3. 4 indicates the normally fixed member of the viseto which is opposed the movable member 5, shown as integral with orsecured to the guiding bar 6 which passes through the fixed member 4. 'Iis any suitable actuating screw with its actuating head 8, through whichpasses the manual slide rod 9 with its movement-limiting ends or knobsI0.

It will be observed that the vise members 4 and have opposable,generally parallel gripping surfaces 4a and 5a.

So far, I have described a conventional vise, it being understood thatmy invention is not limited to any particular vise structure, but may beapplied to a variety of structures in which opposed clamping members maybe moved toward and away from each other.

I2 indicates a bending brake base or member shown as including a frontplate or portion I3, a top plate or portion i4, and side or end portionsI5. The brake base is shown as being so formed as to t over and conformto the upper surface of the member 4, while its portion I3 abuts againstthe front surface 4a of the fixed vise member 4.

When the brake base is dropped into the position in which it is shown inFigures 3 and 4 it may be locked, for example, by tightening the screwsI8 in the threaded apertures ia of the end members I5. The result is tolock the parts firmly in position, particularly in view of the fact thatthe member I4 of the brake base conforms to the downwardly curvedshoulder to the rear of the vise member 4. When the sharp points of thescrews I8 enter the opposite sides of the vise member 4, the brake baseis positively locked it is shown in the drawings.

Pivoted to the ends of the brake base, as by the headed screws 20, is ayoke, generally indicated at 2 i, and having parallel outer end members22 connected by inclined members 23 which converge upon an enlargement24, carrying a sleeve 25 into which any suitable brake operating handle25 may be removably inserted. The yoke may be pivoted upon thecylindrical heads or enlargements 20a of the screws 2B, which arereceived in appropriately formed bearing apertures 22a.

The side members 22 of the yoke are angleshaped, as shown, for example,in Figures 2 and 4. At the angle I provide a connecting bearing bar 30about which rides a roller 3|. The ends of the bar 30 pass throughapertures 32 in the end members 22 of the yoke. They may becircumferentially channeled, or otherwise suitably formed, to receivelocking members, such as the split rings 33. The roller 3I is free torotate on the bar 3D, and is confined between the end members 22. Itwill be understood that when the parts are secured together, as shown inthe drawings, a rotation of the yoke about the centers formed by thebearing members 20a., moves the roller 3| across the gap between thevise members, when they are in the open position of Figure 2. Similarly,clockwise movement of the yoke will move the roller 3| against any pieceof material, such as sheet material, which is gripped between themovable vise member 5 and the front surface of the yoke base. Whereas,in Figure 4, I illustrate a piece of sheet metal 50 being bent to theright, referring to the position of the parts shown in that figure, Imay equally readily bend the metal to the left by positioning the yokeinitially in the position in which it is shown in Figure 4, and theninserting a piece of sheet metal into the space between the yoke Ybasemember I2 and the movable vise member 5. It will be understood, also,that in situations where there is an advantage of having the vise member5 terminate at the plane or elevation of the yoke thereby in the workingposition in which trative or diagrammatic, rather than as limiting.

me to my precise Showing.

The use and operation of the invention are as follows:

I illustrate a simple bending brake, structure which may, for example,be removably applied to a work bench vise. It will be understood that itmay also be used on a permanent base, as a light bending brake. The userhas the optionof employing the vise itself to grip the articles beingbent, or of leaving sufcient clearance to position or drop the sheetmembers into'the open space between the relatively movable vise members.

In order to bend a piece of sheet metal wider than the width of the visemember 5a thin angular member 5i', of suficient length,v and as shown indotted lines in Figures 1 and2, may be used for the holding or bendingedge.

I claim: f

l. In a demountable bending brake structure, a brake base having a frontportion formed to engage and conform to the front surface of a visemember, a top portion adapted to engage and conform to the upper surfaceof the vise member, end portions spaced laterally from the ends of saidvise member, locking Velements adapted to extend between said endportions and the end surfaces of the vise membena yoke pivoted on saidbrake base for rotation'about a center positioned substantiallybelow'the top ofthe vise member and at a greater distance below said topmember than said locking elements, and a transverse material engagingmember on said yoke movable, in response Vto rotation of said yoke,through a pathextending abovev and across the 4 gripping face of saidfront portion and the adjacent gripping face of a relatively movablesecond vise member.

2. In a demountable bending brake structure, a brake base having a frontportion formed to engage and conform to the front surface f a visemember, a top portion adapted to engage and conform to the upper surfaceof the vise member, end portions spaced laterally from the ends of saidvise member, locking elements adapted to extend between said endportions and the end surfaceseof thefvise member, a yoke pivoted on saidbrake base for rotation about a center positioned substantally below thetop of the vise member and at a greater distance below said top memberthansaid=locking elements, and a transverse material engaging member onsaid yoke movable,l in response to rotation of said yoke, through a pathextending above and across the gripping face of said front portion'andthe adjacent gripping face ofa relatively movable second vise member,the yoke having angular ois'ets, said material engaging member beingrotatably mounted between angular offsets whereby, when said yoke is ina generally horizontal position, the material engaging" member is"positioned' 'forwardly at the front wall of the brake base. l

PETER References Cited in the-file of this patent UNITED STATESPA'rnn'rs Number Name Date 156,386 Stephens f Oct.'27,'1874 195,627Meikle Sept; 25, 1877 647,310 Mast; Apr. 10', 1900 795,916 Jones Aug.r1,. 1905 1,397,980 Ouellette f Nov.f22, 1921 1,426,026 Webster f Aug.15, 1922 1,788,241 Kent Jan. 6, 1931 FOREIGN PATENTS Number Country Date244,605 Great Britain Dec. 24, 1925 492,624 Germany Feb. 28, 1930541,479 Great Britain Nov. 28, 1941

